Thirty minutes, and 31g of protein without any animal in it. Steam the tempeh first — that is the step that removes the bitterness people blame on tempeh itself.

Tempeh is the most useful plant protein in a British supermarket and the one almost nobody buys.
Tempeh is whole soybeans fermented into a firm cake, which puts it well ahead of tofu on protein and fibre per 100g and makes it a complete protein — it contains all nine essential amino acids in useful amounts, which most single plant foods do not. The fermentation also breaks down phytates, so the iron and zinc in it are better absorbed than from unfermented soy.
Cauliflower is a brassica, and brassicas carry glucosinolates, the compounds that become sulforaphane and indole-3-carbinol. Those influence how the liver processes oestrogen — the same mechanism behind broccoli sprouts, covered here: how to lower oestrogen in men.
The tahini is not a garnish. Sesame seeds are one of the better plant sources of zinc, which holds an authorised claim for the maintenance of normal testosterone levels in the blood — and zinc is where plant-based eaters most often fall short, because phytates in grains and pulses reduce its absorption.
Turmeric is here for flavour and colour. Curcumin is poorly absorbed from food, and the doses used in trials are far beyond what a teaspoon delivers; treat it as seasoning rather than medicine.
It keeps three days in the fridge and the dressing keeps five. Make double.